Optoelectronics

Name the type of transducer used in acousto -optic modulator

• heat

• Light

• sound

• Pressure

List the types of optical modulators

What is the limitation of AOM ?

• Sensitive to noise

• Weak signal

• poor stability

• Short range communication

AOM cavity is terminated by ----------

• reflector

• absorber

• difractor

• None

The characteristics of directional coupler is determined by ---------- and --------

Optical directional coupler consists of two optical -------------

• wave guides

• plates

• tubes

• cables

The ratio of Powe levels in the primary and secondary lines is called as -------

• Directivity

• Coupling factor

• Efficiency

• Attenuation

Which one of the following is a nondiscriminant intensity reducing filter?

• absorption

• Natural density

• Dichorioic

• Short pass filter

--Filter absorb unwanted light

the fraction of loss occurs because of the switch is called as ------- loss

• insertion

• power

• gain

• signal